anonymous
  • anonymous
What is the estimated sum? Round each number to the nearest hundred before adding. 521,370 + 26,839
Mathematics
schrodinger
  • schrodinger
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myininaya
  • myininaya
well have you rounded each number to the nearest hundred yet the hundreds place is the 3rd digit from the right
anonymous
  • anonymous
im not the best at math i just started 5th grade and it sucks DX
myininaya
  • myininaya
let's look at the 370 part of that one number

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myininaya
  • myininaya
the 3 is in the hundreds spot the 7 which is in the tens spot will tell us to round up or down
mathstudent55
  • mathstudent55
First, you need to know which digits is the hundreds digit. See figure below. |dw:1439929755561:dw|
myininaya
  • myininaya
round up or keep the number in the hundreds spot as is*
anonymous
  • anonymous
we should round up
myininaya
  • myininaya
right so 370 rounded to the nearest hundred is 400
anonymous
  • anonymous
ok
myininaya
  • myininaya
so that one number rounded to the nearest hundred is 521,400
myininaya
  • myininaya
what about 839
anonymous
  • anonymous
keep it how it is?
myininaya
  • myininaya
so that means we keep 8 as 8 everything else to the right of the hundreds place change to 0 so 839 rounded to the nearest hundred is 800
myininaya
  • myininaya
\[521,400+26,800\]
anonymous
  • anonymous
wow your good o.o
myininaya
  • myininaya
line up the ones digit with the ones digit from the other number then line up the tens digit with tens digit from the other number and so on... just add column by column (you may have to carry) |dw:1439930099645:dw|
anonymous
  • anonymous
548,200
myininaya
  • myininaya
|dw:1439930295952:dw|
myininaya
  • myininaya
that's right!
anonymous
  • anonymous
yay!!!!

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